Sally is the witch princess of the Magic Kingdom who longs to visit the mortal realm, presumably to make friends her own age. One day, by mistake, Sally teleports to the "mid world" (Earth), where she uses her magic to fend off a couple of burglars menacing two schoolgirls. Immediately befriended by her new acquaintances — tomboyish Yoshiko Hanamura (known affectionately as "Yotchan") and girly Sumire Kasugano — Sally decides to stay on Earth indefinitely, leading to mischief. Sally tries to keep her supernatural abilities secret, assuming the role of a human child. - wikipedia